The Chinese Participants:

Speaker	Title	Abstracts
Bao-An Li	From Earth to Heaven: Probing Properties of Neutron Stars with Nuclear Reactions in Terrestrial Labs
Jing-Dong Bao	Effect of Friction on Neutron Emission in Fission of Heavy Nuclei
Feng-Shou Zhang	A microscopic transport model for synthesis of superheavy nuclei
Bing Guo	Measurements of (p,g) s-factor and reaction rates by transfer reaction of mirror nuclei and the direct measurement of 11C(p,g)12N
Zu-Hua Liu	Effects of breakup of weakly-bound nuclei and neutron transfer on the fusion reactions
You-Bao WANG	A systematic study of b- decay of neutron-rich Rh and Ag isotopes
Zhu-Xia Li	Elliptic flow in heavy ion collisions at intermediate high energies
Sheng-Yun Zhu	g- factor measurement of high spin states in 83 Y by TMF-IMPAD
Zhong-Yu Ma	Giant and Pygmy resonance in the relativistic approach
Bing-Song ZOU	Pentaquark components in baryons
Zhi Qin	Preparation of gas-chemistry of Dubnium at IMP
Jian-Song Wang	Properties of the Initial Participant Matter Interaction Zone in Near Fermi-Energy Heavy Ion Collisions
Hu-Shan Xu	Status and prospects of heavy element study at IMP
Guo-Qing Xiao	Status of the CSR and RIB
Zhi-Gang Xiao	Nuclear Physics Programs at HIRFL-CSRm
Shu-Wei Xu	Beta-delayed proton decays in the rare-earth region near the proton drip line
Shan-Gui ZHOU	Deformed relativistic Hartree Bogoliubov theory for exotic nuclei
Zhong-Zhou Ren	Structure and decay of heavy and superheavy nuclei
Dan-Yang Pang	Elastic transfer reactions of 25 MeV/nucleon 6He on 9Be target
Jie Meng	Time-odd triaxial relativistic mean field approach for nuclear magnetic moment in Odd-A nuclei
Fu-Rong XU	Deformation effects on the structures of N=7 halo nuclei
Cui-E Wu	Neutron removal reactions of 17C
Wang Xu/Jin-Gen Chen	Status report on SLEGS
Jin-Hui Chen	Φ-meson production in heavy-ion collisions at RHIC
Wei-Zhou Jiang	Magnetic susceptibility? of collapsed stars in hadron and quark phases
Guo-Liang Ma	Azimuthal correlation of hadrons in a partonic/hadronic transport model
Yu-Gang Ma	Coalescence and scaling of elliptic flow in intermediate energy heavy ion collisions
Kun Wang/ De-Qing Fang	Measurements of the reaction cross sections and momentum distributions for 23Al neighbouring nuclei
Lie-Wen Chen	A dynamical quark coalescence approach to φ and Ω production in heavy ion collisions at RHIC
Yu-Min ZHAO	Manybody system with random interaction
Sheng-Jiang Zhu	High spin states in 136,137La, 108,110,102Ru and 105Mo nuclei
Peng-Fei Zhuang	A strongly coupled quark-meson-diquark plasma
Xin Dong	The Time-Of-Flight Detector for RHIC/STAR and Related Physics
Qun WANG	Nutrino emmissions in color superconducting quark matter

The Japanese Participants:

Name	topic	Abstracts	PPT
Dripline Nuclei
K.Matsuta	Nuclear structure study through nuclear moments of mirror pairs
T.Nakamura	Invariant-mass spectroscopy of neutron halo nuclei
A.Ozawa	Reaction cross sections of unstable nuclei
Super Heavy Elements
Y.Nagame	Chemical and nuclear studies of the heaviest elements at JAEA
K. Morimoto	Experiments on synthesis of the heaviest elements at RIKEN
Hyper Nuclei
E.Hiyama	Three- and four-body structure of S=-2 hypernuclei
M.Iwasaki	Konic atoms
Nuclear Astrophysics
H.Utsunomiya	Photonuclear reactions in astrophysics
S.Kubono	Experimental Study of Stellar Reactions with Low-Energy RI Beams
K.Sumiyoshi	Core-collapse supernovae, neutron stars and black holes in the light of physics of unstable nuclei
K. Sagara	Direct measurement of 12 C+ 4 He→ 16 O+Y reaction at stellar energy
Few-body Problems
K.Sekiguchi	Experimental Study of Three Nucleon Forces via Few Nucleon System
Heavy Ion Reaction
K.Hagino	Large-angle quasi-elastic scattering around the Coulomb barrier
Nuclear Structure
S.Shimoura	Nuclear spectroscopy using direct reactions of RI beams
A.Tamii	Spin-flip excitations studied by high-resolution (p,p') scattering experiment at forward angles
H. Toki	Relativistic chiral mean field model for finite nuclei
T.Nakatsukasa	Nuclear dynamics in time-dependent picture
Y.Utsuno	Structure of exotic nuclei by large-scale shell model calculations
High spin states
E.Ideguchi	Study of high-spin states by using stable and unstable nuclear beams
M.Matsuzaki	Wobbling motion in triaxial superdeformed nuclei
Instrumentations and Applications
M.Wada	A universal slow RI-beam facility at RIKEN RIBF
S. C.Jeong	Diffusion experiment by using the short-lived radiotracer of 8Li
Accelerator Projects
T.Nagae	Physics Programs at J-PARC
H.Sakurai	Physics opportunities with the RI Beam Factory at RIKEN Some new development of nuclear phys, eg. photonuclear reactions with gamma beams
T.Hotta	Recent results and future prospects of the Laser Electron Photon Experiment at SPring-8
A.Hosaka	Photo-productions of baryon resonances and pentaquarks
QGP
Y.Miake	Azimuthal Anisotropy and the QGP
T.Hirano	Perfect fluidity of QGP at RHIC?

The Chinese Participants:

From Earth to Heaven: Probing Properties of Neutron Stars with Nuclear Reactions in Terrestrial Labs 

Bao-An Li

Arkansas State University 

Neutron stars are highly condensed stellar objects produced in supernova explosions, the end point in the evolution of more massive stars. The masses of neutron stars are in the range of 1-2 times of the sun, whereas their typical radii are only 10-20km. The matter they contain, primarily neutrons, is therefore the densest found outside black holes in the universe. Neutron stars thus provide a laboratory to verify our understanding of nature at the extreme, and verify our theories of matter, energy and their interactions. However, they are still among the most mysterious objects in the universe and pose a great scientific challenge. The structure and properties of neutron stars are determined by the Equation of State of the matter they contain. Nuclear reactions conducted in terrestrial laboratories can produce nuclear matter similar to those contained in neutron stars. In this talk, I will first review the latest theoretical and experimental efforts in probing the EOS of neutron-rich matter using nuclear reactions, especially those induced by radioactive beams, in terrestrial labs. Major ingredients of an isospin and momentum-dependent transport model for nuclear reactions will then be presented. In comparison with recent experimental data we give a stringent constraint on the EOS of neutron-rich nuclear matter. Implications of this result on the masses and radii of neutron stars will be discussed finally.

Effect of Friction on Neutron Emission in Fission of Heavy Nuclei 

Jing-Dong Bao

Department of Physics, Beijing Normal University, Beijing, 100875, China

By using the {c, h, \alpha} parameterization to describe the deformation process of heavy nuclei, a Langevin equation for fission dynamics with neutron emission is presented and the Monte-Carlo calculations of pre-scission neutron multiplicities are performed. The effect of different damping coefficients on the result is compared, especially the distributions of neutron emission when the system first and last passes the saddle point are distinguished.

A microscopic transport model for synthesis of superheavy nuclei
Feng-Shou Zhang
Institute of Low energy Nuclear Physics, Beijing Normal University

Isospin dependent molecular dynamics model has been used successfully for studying isospin effects of heavy ion collisions at intermediate energies. However, there are problems with this model for studying nuclear fusion at low energies near Coulomb barrier, such as unphysical nucleon emissions in the process of projectile and target approaching, lack of shell effect, etc. In the present report, we improve the previous model with various aspects for studying the dynamical process for synthesis of superheavy nuclei at low energies. The shell correction energy of the system is calculated by using deformed two-center shell model. The surface energy of the system is improved by introducing a switch function that combines the surface energies of projectile and target with the one of the compound nucleus. For reaction systems of 16O+16O, 40Ca+40Ca, 40Ca+48Ca and 48Ca+48Ca at low energies near Coulomb barrier, it is found that the calculated fusion cross sections show a strong enhancement for the neutron-rich combinations, which can regenerate the experimental data quantitatively. For heavy systems such as 48Ca+208Pb and 48Ca+238U, preliminary calculations show that the experimental capture cross sections can be reproduced quanlitively. This model could pave a way for realistic predication cross sections for synthesis of superhavey nuclei for different projectile-target systems at low energies near Coulomb barrier in future experiments.

Measurements of (p,g) s-factor and reaction rates by transfer reaction of mirror nuclei and the direct measurement of ¹¹C(p,g)¹²N

Bing Guo

CIAE， Beijing

We analyzed the ⁸Li(d,p)⁹Li_g.s. and ²⁶Mg(d, p)²⁷Mg angular distributions through DWBA, and then derived the neutron ANC for virtual decays ⁹Li→⁸Li + n and ²⁷Mg→²⁶Mg + n. The proton ANCs for ⁹C→⁸B + p and ²⁷P→²⁶Si + p were extracted by using charge symmetry of mirror nuclei, and then utilized to calculate the astrophysical S-factor and reaction rate of the direct capture for ⁸B(p,g)⁹C and ²⁶Si(p,g)²⁷P. In addition, the proton widths were also deduced from the experimental neutron ANCs and used to compute the contribution of resonant captures into the first and second excited states of ²⁷P.

The ¹¹C(p,g)¹²N is one of the key reactions in the hot pp chains, which are believed to be of importance for the evolution of very low-metallicity, massive stars. There are large discrepancies in the existing indirect measurements and theoretical calculations of this reaction for both direct and resonant captures. In order to clarify these discrepancies, the direct measurement of excitation function for ¹¹C(p,g)¹²N has been proposed by using high precision DRAGON spectrometer at TRIUMF lab of Canada. This proposal has been approved and given with 20 shifts at medium-high priority.

A systematic study of b^- decay of neutron-rich Rh and Ag isotopes 

Youbao WANG

CIAE， Beijing

This presentation delivers the recent study of the low-lying level structure of neutron-rich even-mass 114-118Pd and 116-120Cd via - decay. These nuclei belong to a shape transitional region, and many different excitation modes are expected to show up. Therefore, even the low-lying states might arise from very different origin, and get mixed to some extent. These features of neutron-rich even-even Pd and Cd nuclei inspire and test various nuclear models.

The experiment was carried out on the Ion-Guide Isotope Separator On-Line (IGISOL) facility at Department of Physics, University of Jyväskylä (JYFL). The low-lying level structure of Pd and Cd nuclei was studied by － decay of odd-odd Rh and Ag isotopes. We apply 25 MeV proton induced fission of natural uranium and fission ion guide techniques to produce on-line mass separated sources. These sources are then implanted into a movable tape that is viewed by a 4p plastic scintillator for beta's and four 70% Eurogam phase-I HPGe detectors. Conventional - and - coincidence spectroscopy is used to construct the decay scheme and to deduce the level properties.

These experimental studies have resulted in the identification of many new levels and transitions in neutron-rich even-even Pd and Cd nuclei. The systematics of low-lying collective and two-quasiparticle levels in even Pd nuclei has been extended to very neutron-rich 118Pd. In Cd nuclei, the complete set of three-phonon vibrational quintuplet has been observed in 116Cd and extended to 120Cd.

Elliptic flow in heavy ion collisions at intermediate high energies

Zhuxia Li

China Institute of Atomic Energy, Beijing

The elliptic flow for $Z\le2$ particles in heavy ion collisions at energies from several tens to several hundreds MeV per nucleon is investigated by means of transport model, i.e. a new version of the Improved Quantum Molecular Dynamics model (ImQMD05). In this model, a complete Skyrme potential energy density functional is employed. The influence of different effective interactions and medium corrections of nucleon-nucleon cross sections on the elliptic flow are studied. Our results show that a soft nuclear equation of state and incident energy dependent in-medium nucleon-nucleon cross sections are required for describing the excitation function of the elliptic flow at intermediate energies. The size dependence of transition energy for the elliptic flow at intermediate energies is also studied. The system size dependence of transition energies fits a power of system size with a exponent of 0.223.

Giant and Pygmy resonance in the relativistic approach

Zhongyu Ma

CIAE 

A fully consistent Relativistic Random Phase Approximation (RRPA ) is applied in the sense that the relativistic mean filed (RMF) wave function of nucleon and the RRPA renormalization are calculated in a same effective Lagrangian. By using effective Lagrangians which, in the mean-field approximation, provide an accurate description of ground-state properties, an excellent agreement with experimental data is also found for the excitation energies of giant resonances as well as of low-lying collective states.

A proper treatment of the resonant continuum is to take account of not only the energy of the resonant state, but also its width in the application to exotic nuclei. The effect of the resonant states on pairing correlations is presented based on the relativistic mean field theory plus BCS approximation. The low-lying isovector dipole strengths in neutron rich nuclei 26 Ne and 28 Ne are investigated in the quasi-particle relativistic random phase approximation. The results are compared with the recent experimental observables at RIKEN.

The relationship between the nuclear giant resonances and nuclear properties, such as incompressibility and the symmetry energy and the correlation between the pygmy resonance and the symmetry energy are investigated.

Pentaquark components in baryons
Bing-Song ZOU

Evidence for large pentaquark components in baryons is becoming convincing from the newest results of g0 electron-proton scattering experiment and BES J/psi experiment. A configuration similar to a diquark-model configuration proposed for the q pentaquark is suggested to be the main configuration for the multiquark components in baryons rather than the conventional meson-cloud configuration.

Preparation of gas-chemistry of Dubnium at IMP
Z.Qin, J.S. Guo, X.L. Wu, H.J. Ding, Z.G. Gan

Institute of Modern Physics, Chinese Academy of Science,
Lanzhou 730000, P.R. China

Investigation of the chemical properties of transactinides has become one of the most exciting and fascinating subjects in nuclear and radiochemistry. The chemical investigation of SHE have been performed for Rf, Db, Sg, Bh and Hs, recently extended to element 112. The results show that elements of 104-108 are placed into the expected groups 4-8 of the periodic table. The first gas-chemistry experiment shows that element 112 has an indication of Rn-like rather than Hg-like. The strong relativistic effect on the out-orbit electrons of superheavy elements(SHE) is expected to induce deviations in chemical properties from the periodicity based on their lighter homologues in the Periodic Table.

Two new isotopes of 259 Db and 265 Bh were successfully produced and identified via 241 Am( 22 Ne,4n) 259 Db and 243 Am( 26 Mg,4n) 265 Bh, respectively, at Heavy Ion Research Facility Lanzhou (HIRFL). The isothermal chromatography is one of the most useful methods which have been successfully applied to study of the gas-chemistry of the lighter transactinides. As the start-up of the chemistry of SHE at IMP, volatile compound of the dubnium will be investigated. We have prepared an isothermal chromatography apparatus, revision of OLGA-III. The recoiling reaction products were thermalized in helium loaded with KBr aerosol, and transported through the capillary to the chemical separation device. First section of chromatography was heated up to 900 -1000 ° C where plugged with quartz wool. The products attached on the aerosol were released, and reactive gas HBr was induced to this area to form the volatile compounds. With the He-stream, the volatile compounds pass through the isothermal chromatography section, and they were attached to new aerosol particles and transported through a thin capillary to the detection system. This so-called reclustering process was very effective and allowed to collect the aerosols on thin ( ? 40 m g/cm 2 ) polypropylene foils in the rotating wheel detector system. Thus, samples could be assayed from both sides in a 4 p geometry, which doubled the counting efficiency.

Properties of the Initial Participant Matter Interaction Zone in Near Fermi-Energy Heavy Ion Collisions
Jiansong Wang
Institute of Modern Physics, Chinese Academy of Sciences

The sizes, temperatures and free neutron to proton ratios of the initial interaction zones produced in the collisions of 40 MeV/nucleon 40Ar + 112Sn and 55 MeV/nucleon 27Al + 124Sn are derived using tota ldetected neutron plus charged particle multiplicity as a measure of the impact parameter range and number of participant nucleons. The size of the initial interaction zone, determined from a coalescence model analysis, increases significantly with decreasing impact parameter. The temperatures and free neutron to proton ratios in the interaction zones are relatively similar for different impact parameter ranges and evolve in a similar fashion

Status and prospects of heavy element study at IMP

Hushan Xu

(Institute of Modern Physics, the Chinese Academy of Sicences , Lanzhou 730000, P.R. China)

The project of super-heavy nuclei (SHN) research was initiated years ago at the Institute of Modern Physics , the Chinese Academy of Sciences (IMP). In the talk, the studies, including the present status and future plan of SHN research at IMP will be introduced. The main contents are as follows.

•  The theoretic study on the synthesis of SHN with DNS calculation.

•  The equipments for SHN research at IMP.

•  The experimental work has been done at IMP.

•  The short-term and long term plans for SHN research at IMP.

Radiation Effects in Structural Materials of Reactors

Simulated Using Swift Heavy-ion Irradiations

Nuclear Physics Programs at HIRFL-CSRm

Zhigang Xiao

IMP ， Lanzhou 730000

An internal and an external target experiment will be built at HIRFL-CSRm for a serials of nuclear physics programs. This talk introduces briefly the conceptual design of these two experiments. Current status of the detector development and the pre-simulations are reported.

Radiation Effects in Structural Materials of Reactors

Simulated Using Swift Heavy-ion Irradiations
WANG Zhi-guang

(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China )

Radiation damage in structural materials of fission/fusion reactors is mainly attributed to the evolution of intensive atom displacement damage induced by energetic particles ( n, a and/or fission fragments ) and high-rate helium doping by direct a particle bombardments and/or ( n, a ) reactions. It can cause severe degradation of reactor structural materials such as surface blistering, bulk void swelling, deformation, fatigue, embrittlement, stress erosion corrosion and so on that will significantly affect the operation safety of reactors. However, up to now, behavior of structural materials at the end of their service can hardly be fully tested in a real reactor. In the present paper, damage process in reactor structural materials is briefly introduced, then the advantages of energetic ion implantation/irradiation especially high-energy heavy ion irradiation are discussed, and several typical examples on simulation of radiation effects in reactor candidate structural materials using high-energy heavy ion irradiations are pronounced. Experimental results and theoretical analysis suggested that irradiation with energetic particles especially high-energy heavy ions is very useful technique for simulating the evolution of microstructures and macro-properties of reactor structural materials.

Beta-delayed proton decays in the rare-earth region

near the proton drip line

Xu Shu-wei

Institute of Modern Physics, Chinese Academy of Sciences

Lanzhou 730000, China

Historical review on the experimental study of β -delayed proton decays in the rare-earth region was simply presented. The physical results of the β -delayed proton decays obtained at IMP, Lanzhou over the last 10 years were summarized, mainly including the first observation of 9 new β -delayed proton precursors and the new data for 2 waiting-point nuclei in the rp-process. The results were compared and discussed with different nuclear model calculations. Finally, the prospective in near future was briefly introduced.

Structure and decay of heavy and superheavy nuclei

Zhongzhou Ren and Chang Xu

Department of Physics, Nanjing University, Nanjing 210008, China

Research on superheavy nuclei is one of the hot points in nuclear physics. The structure and decay of heavy and superheavy nuclei are systematically studied by different models. New models of $\alpha$-decay half-lives and new formulae for nuclear binding energies and spontaneous fission half-lives are presented. The theoretical results are in good agreement with available data of heavy and superheavy nuclei. The properties of unknown superheavy nuclei are predicted.

Elastic transfer reactions of 25 MeV/nucleon 6He on 9Be target

 Danyang Pang

PKU

The angular distribution of the elastic transfer cross sections of the 9Be(6He,9Be)6He reaction was measured at the laboratory energy of E = 150 MeV for projectile 6He. From a distorted-wave Born approximation analysis, the spectroscopic amplitude of the 3He cluster in the 9Be nucleus was extracted and compared with those obtained with shell model calculations. The result shows that the extracted spectroscopic amplitude should be larger than 0.70, with the latter one being the shell-model prediction.

Time-odd triaxial relativistic mean field approach for nuclear magnetic moment in Odd-A nuclei

Jie Meng
Beijing University

The time-odd triaxial relativistic mean field approach is developed and applied to the investigation of the ground-state properties of light odd mass nuclei near double-closed shells. The violation of the time reversal invariance due to the odd nucleon creates a non-vanishing nuclear current, i.e, the spatial part of the $\omega$-field, which in turn produces a nuclear magnetic potential, i.e., the spatial part of the vector potential, and changes the nuclear wave function, magnetic moment, single-particle energy and angular momentum, etc. Taking into account the violation of the time reversal invariance self-consistently, the splitting of the single particle levels due to the violation of the time reversal invariance is around $~0.5$ MeV near the Fermi level in $^{17}$F, the core polarizations, the distributions of Dirac current and density in three dimensional coordinate space are investigated in details and the nuclear magnetic moments including the isoscalar and isovector ones of light odd mass nuclei near double-closed shells are calculated and good agreement with Schmidt values are obtained.

Deformation effects on the structures of N=7 halo nuclei

Fu-Rong XU
Beijing University

The structure of nuclei near the drip lines has always been fascinating as they are strongly influenced by the weak binding of valence nucleons. To some extent, the description of such exotic structures is still challenging for nuclear structure models that were determined largely with stable nuclei. For example, mean-fields models describing nuclear structures in terms of single-particle properties can’t give the correct ground-state spin and parity of 11Be, due to the significant mixture of collective freedom degrees. We have performed the Skyrme-Hartree-Fock calculations to investigate the structures of N=7 isotones. The pairing is treated by Lipkin-Nogami method with blocking effects taken into account. A volume-surface-mixing pairing interaction has been adopted. Calculations show very large deformations for the 1/2+ states of N=7 isotones, which is consistent with experiments in some respects, such as very large reaction cross sections and large B(E2) values. Large deformations result in good agreement between calculations and experiments in the nuclear density distributions. The calculation shows that the 1/2+ state in 9He could be a spherical halo attached to a deformed core. Large deformation effects were found on the structures of the N=7 halo nuclei. From our calculations, it has also been seen that new mechanism and improvement in models should be needed to describe light exotic nuclei which could have cluster structures.

Neutron removal reactions of ¹⁷C

CuieWu

Peking University

Measurement of one-, two- and three-neutron removal cross sections of ¹⁷C at 79A MeV on a ¹²C target has been carried out using the fragment separator RIPS of RIKEN. The detailed experimental setup and the process of data analysis will be mentioned. The one-neutron removal cross sections were compared with the few-body Glauber calculations coupled with the spectroscopic factors from the shell model. A fair agreement between the calculation and the experimental data was found, although the calculations underestimate the data at higher energies and overestimate the data at lower energies. The prediction of the relation between the reaction cross sections and one-neutron removal cross section can be well satisfied, which means that ¹⁷C could be described by a core plus a valence neutron system. The two- and three-neutron removal cross sections of ¹⁷C are reported for the first time waiting for the theoretical interpretation.

Status report on SLEGS

Xiang-Zhou Cai, Jin-Geng Chen, Wei Guo, Wen-Qing Shen, Wang Xu, Hong-Wei Wang, Yu-Gang Ma （SINAP）

SLEGS (Shanghai Laser Electron Gamma Source) is a high intensity MeV gamma source & highly polarized gamma source, which is generated by laser beam Compton back scattering on 3.5 GeV electron at a straight of the electron storage ring of SSRF. The total flux of SLEGS is about 10^7-8/Ws and the energy of a gamma ray will be less than 23 MeV with CO2 laser, a high power infrared laser. SLEGS is a nearly 100% polarized gamma source as laser beam is fully polarized. Low energy photon scattering process is a well known and powerful tool to probe the structure of nucleon and nuclei, to determine energy levels and parities of excited states and to measure the photodisintegration cross-section at low Ecm, thus extracting S factor of astrophysical reaction. With sophisticated detector packages, a target system or a polarized target, and SLEGS, the low energy photon experiments can be conducted in SSRF. Beforeconstructing SLEGS, separate arrangement will be made, within next two years, to produce another low flux gamma source using a 100 MeV linear accelerator at SINAP (Shanghai INstitute of Applied Physics) in JiaDing, Shanghai. The detailed status of SSRF and SLEGS will be reported.

Magnetic susceptibility? of collapsed stars in hadron and quark phases

Weizhou Jiang

The formulae of magnetic susceptibility (MS) of charged particles are deduced in non-relativistic and relativistic mean-field approximations in bulk matter. The analytic relativistic expression at high densities and strong fields, deduced for the de Hass-van Alphen (HVA) oscillation, shows that the oscillation frequency is proportional to the squared chemical potential and the reciprocal of the field, and is independent of the temperature. Numerical calculations are performed at finite temperatures and in a field range where the equation of state (EOS) is not sensitive to the field. The non-oscillatory MS of the protoneutron star, which is dominated by the contributions of electrons (and light quarks, if deconfined) and is almost independent of the field, decreases as the protoneutron matter becomes denser. The numerical results for the HVA oscillation are also given. The oscillation amplitude becomes larger as the star becomes colder. A superposition of the HVA oscillations changes the oscillation properties drastically if the color deconfinement occurs at high densities.

Manybody system with random interaction

Yu-Min ZHAO

In recent years my collaborators and I have been studying regularities of many-body systems in the presence of random interactions. This topic was ignited by numerical observations by Johnson, Bertsch and Dean that spin zero ground state dominance (0 g.s.) can be obtained by using random interactions. Many authors focused on the 0 g.s. dominance. There are also many authors studying collectivity by using random interactions. I would like to talk about the recent progresses along the above line.

A dynamical quark coalescence approach to φ and Ω production in heavy ion collisions at RHIC
Lie-Wen Chen
Shanghai Jiotong University

Based on the phase-space information obtained from a multi-phase transport model within the string melting scenario for strange and antistrange quarks, we study the yields and transverse momentum spectra of φ mesons and Ω baryons as well as their anisotropic flows in Au+Au collisions at RHIC using a dynamical quark coalescence model that includes the effect due to quark phase-space distributions inside hadrons. With current quark masses and fixing the radii of φ mesons and Ω baryons from fitting the measured yields, we first study the ratio of the yield of Ω baryons to that of φ mesons as well as their elliptic and fourth-order flows as functions of the transverse momentum. How the elliptic and fourth-order flows of φ mesons and Ω baryons are related to those of strange and antistrange quarks is then examined. The dependence of above results on the radii of φ mesons and Ω baryons as well as on the strange quark mass is also studied.

A strongly coupled quark-meson-diquark plasma

Peng-Fei Zhuang
Tsinghua University

We investigate mesons and diquarks as resonant states above chiral phase transition in flavor SU(2) Nambu--Jona-Lasinio model. For each kind of resonance, we solve the pole equation for the resonance mass in the complex energy plane, and find a limit temperature where the pole starts to disappear. The phase diagram including the limit temperatures in $T-\mu$ plane is obtained. The maximum limit temperature at $\mu=0$ and the maximum limit chemical potential at $T=0$ are approximately two times the corresponding critical values for chiral phase transition.

High spin states in 136,137La, 108,110,102Ru and 105Mo nuclei
S. J. Zhu1, J. H. Hamilton2, A. V. Ramayya2, J. K. Hwang2, M. L. Li1, S. D. Xiao1, X. L. Che1, Y. N. Yu1, H. B. Ding1, L.H.Zhu3, G. S. Li3, S.X.Wen3, X. G. Wu3, Z. M. Wang3
1Department of Physics, Tsinghua University, Beijing 100084
2Department of Physics, Vanderbilt University, USA.
2China Institute of Atomic Energy, Beijing 102413

High spin states in 136,137La were populated through the reaction 130Te(11B,5n) and 130Te(11B,4n) at the beam energies of 50 and 60 MeV respectively. The Experiments were carried out at the China Institute of Atomic Energy (CIAE). The gamma-gamma coincidence measurements were performed using the array of fourteen Compton-suppressed Ge detectors. The new level schemes of 136,137La have been established. In the 136La, the level scheme with three collective band structures has been updated with spin up to 20 h. The observed ph11/2?nh11/2 band shows g- instability according to the TRS calculations，and its band crossing as well as the signature splitting and inversion has been discussed. Other two bands based on 12- and 16+ levels were proposed as oblate deformation with g~-60° which most probably originate from four- and six- quasiparticle configurations, that is, ph11/2?ng9/2h11/22 and pg7/2?ng7/22d5/2h11/22 respectively. The level scheme of 137La has been expanded with spin up to 33/2h. Several new bands have been found in this nucleus. A band crossing in the band based on 17/2- level has been observed at a rotational frequency of hw~0.48 MeV. The alignment of protons is responsible for the band crossing. Three bands have strong M1 transitions, and one of them is proposed as oblate deformation (g~-60°).
New levels with high spin states in neutron-rich 108,110,102Ru and 105Mo nuclei have been investigated through measuring prompt γ-rays following the spontaneous fission of 252Cf. The experiments were carried out at Lawrence Berkeley National Laboratory with the Gammasphere detector array. A total of 5.7×1011 triple- and higher-fold coincidence events were collected.
In 108,110,102Ru, previously known collective bands, including the ground state band, the one-phonon g-vibrational-rotational band have been confirmed and expanded, and several new bands have been observed for the first time. Among the new observed bands, the two quasiparticle bands have been assigned. The 2-phonon g-vibrational-rotational band has been identified in these nuclei. In 105M, we identified six collective bands. Four of them belong to the one-quasiparticle band, and two of them are assigned as the one-phonon and two-phonon g-vibrational rotational bands. This is a first observation of this kind of bands in the odd- A nuclei in this region.

Nutrino emmissions in color superconducting quark matter
Qun WANG
USTC
Neutrino emissivities due to direct Urca processes of several spin-one color-superconducting phases of dense quark matter are calculated. In particular, the role of anisotropies and nodes of the gap functions is analyzed. Results for the specific heat as well as for the cooling rates of the color-spin-locked, planar, polar, and A phases are presented and consequences for the physics of neutron stars are briefly discussed. Furthermore, it is shown that the A phase exhibits a helicity order, giving rise to a reflection asymmetry in the neutrino emissivity. The analytical form of the mass effects has been derived. The Fermi liquid properties involved in neutrino emissions has been discussed in the NJL framework.

The Time-Of-Flight Detector for RHIC/STAR and Related Physics

Xin Dong

USTC, Hefei

A full barrel Time-Of-Flight (TOF) detector based on the Multigap Resistive Plate Chamber (MRPC) technology will be constructed and installed in the STAR detector at the Relativistic Heavy Ion Collider (RHIC). Several TOF prototypes were tested in the last RHIC runs and they functioned well, satisfying the requested characteristics for the TOF detector by the STAR physics. Some important physics results have been made using these prototypes in STAR and released to publication. With the coming full barrel TOF detector, many measurements on more penetrating probes can be made with high precision and large acceptance. The related physics which may reveal the discovery and property of Quark-Gluon Plasma will be discussed.

The Japanese Participants:

K.Matsuta (Osaka)
Nuclear structure study through nuclear moments of mirror pairs

Electromagnetic moments are the important clues on the nuclear
structure. Comparing nuclear moments of mirror pairs, the information on the
motion of the nucleons inside nucleus can be extracted with less ambiguity,
because of the mirror symmetry. Since the magnetic moments depends
both on orbital angular momentum and intrinsic spin, we can extract both <l>
and <S> from the mirror moments. One of the hot topics is the anomalously
large <S> in extremely proton rich 9C (and 9Li) in isospin T =3/2 quartet,
which may show partial mirror symmetry breaking. Mirror moments in two other
T=3/2 quartets has also been measured, but no other anomaly was not found.
We are interested in the magnetic moment of 23Al, partly because of
its possible one proton halo structure and the above mentioned anomalous
<S> in isospin quartets. The first one, i.e., the proton halo structure, has
been partly solved, since, the observed g-factor of the ground state of
23Al, (1. 557 +/- 0.088), clearly shows the spin and parity 5/2+, which is
consistent with the mirror partner 23Ne, and the possibility of the s wave ground
state spin favored by the large interaction cross section is denied.
The second one, i.e., <S> was determined as 0.41+/- 0.29, and <l> was (2.09
+/- 0.29), from the magnetic moment (3.89 +/- 0.22) n.m., combined with the
presently measured precise magnetic moment of 23Ne, (1.0817 +/- 0.0009)
n.m. Beta decay transition probability can provide with another
information , i.e., Gamow-Teller matrix <t3Sz>. Using the ft-value of the beta
transition from 23Al to the excited state of 23Mg, which is IAS of
23Al, we can separate proton and neutron components. The obtained expectation
values <Sp>, <Sn>, <lp> and <ln> were compared with the shell model
calculation from OXBASH code. The precision is not enough yet, but
will be improved soon like in the light mass T = 1/2 mirror doublets. Other
topics on the mirror moments are also discussed.

H. Toki (RCNP)
Relativistic chiral mean field model for finite nuclei

The chiral symmetry is the most important symmetry in hadron physics. This chiral symmetry is broken in vacuum. It is very important to understand how this symmetry plays a role in the construction of finite nuclei. The Nambu-Goldstone particle of the chiral symmetry breaking is the pion and hence the above question could be restated as how the pion plays an important role in the construction of nuclei. We introduce a finite mean field for the pion and study if this mean field becomes finite by actual calculation. This pion mean field breaks the parity and the charge symmetry and hence we have developed the projection scheme in the relativistic mean field model. We applied the relativistic chiral mean field model to He4. The properties of He4 come out to be very encouraging. We will discuss the outcome of this model in the symposium.

Y.Utsuno (JAEA)
Structure of exotic nuclei by large-scale shell model calculations

Structure of exotic nuclei by large-scale shell model calculations

One of the most intriguing features in the structure of exotic nuclei is the so-called the disappearance of the magic number, which denotes that nuclei around the magic number have no typical magic structure such as a high 2^+ energy level. The N=20 region has been most extensively studied about the disappearance both experimentally and theoretically. We have performed a systematic theoretical
study of exotic nuclei in this region by the large-scale shell model using the Monte Carlo shell model calculation, finding out that not only the correlation energy (including deformation energy) but also the narrowing N=20 shell gap in smaller proton numbers have much contribution to that exotic structure. As the microscopic origin of the narrowing, strong dependence of the monopole interaction due to the tensor force is recently pointed out by Otsuka et al. This gives us not only qualitative
picture about that "shell evolution" but also quantitatively suitable interaction comparable to empirically determined interactions. We are thus now developing a new sd-pf shell interaction, taking care of the tensor force. We are going to present
that the shell structure predicted by such an interaction is much different from that of conventional interactions particularly in the N=28 magic structure around silicon isotopes.

T.Nagae (KEK)
Physics Programs at J-PARC

The Japan Proton Accelerator Research Complex (J-PARC) has been
in construction since 2001 under a joint collaboration between KEK
and Japan Atomic Energy Agency (JAEA) in Tokai, Ibaraki, Japan.
The proton accelerators in J-PARC consists of a 181-MeV proton linac
(to be upgraded for 400 MeV), a 3-GeV rapid-cycling proton
synchrotoron, and a 50-GeV proton synchrotron. In the Phase 1 of the project, three experimental facilities are going to be constructed; a material and life science facility with pulsed neutron and muon beams, a hadron experimental facility with kaons and other beams, and a neutrino experimental facility with a neutrino beam line. A lot of interesting experiments are proposed to use these high-intensity beams available at J-PARC. In this talk, I summarize the nuclear physics program at J-PARC in strangeness nuclear physics and hadron physics.

A.Hosaka (RCNP)
Photo-productions of baryon resonances and pentaquarks

We discuss some general aspects of the photoproduction of hyperon
resonance Lambda(1520) and the pentaquark Theta+, gamma + N -> K + Y,
where K denotes either a kaon or antikaon, and Y either theta+ or
Lambda(1520). The production amplitudes are computed by using an
effective Lagrangian satisfying the gauge and chiral invariance. The
gauge invariance requires the presence of the contact term which leads
to a dominant contribution to the production amplitude, especially
when the spin of Y is 3/2. Since the contact term depends on the
charge of the target, strong asymmetry follows between the production
rates from the proton and neutron targets. For the production of
Lambda(1520), the cross section for the proton target is larger than
for the neutron target, while for the Theta production the cross
section is larger for the neutron target. Furthermore, the contact
term has a strong forward peak when J = 3/2. These properties could
explain the different experimental observations in LEPS and Jlab,
where the observed regions of the two facilities are quite different.

Y.Miake (Tsukuba)

Azimuthal Anisotropy and the QGP

Measurements of azimuthal anisotropy have played major role in RHIC physics.
In non-central nucleus-nucleus collision, the overlapped region has an almond shape
and copious particles are produced from this region in central rapidities. The azimuthal distribution of particles are very much influenced by the relation of the mean free path and the size of the system. When the mean free path is much longer than the system size, the azimuthal distribution are superpositions of independent nucleon-nucleon collisions and are flat in azimuth, while the mean free path is shorter than the system size, a hydrodynamics can be applicable and the emission pattern is influenced by the shape of the system. Thus, the anisotropy in the coordinate space is converted to that in the momentum space. The azimuthal anisotropy of the particle emission is determined by the initial shape of the almond, namely the eccentricity of the almond. The anisotropy in the coordinate system is expected to disappear quickly as the system explodes, and because of that, the azimuthal anisotropy is sensitive to the early stage of collisions. PHENIX collaboration, in particular Tsukuba team has made intensive study of anisotropy measurements at RHIC using reliable reaction plane determination and particle identification capability. In this talk, method of reaction plane determination and elliptic emission of identified charged hadrons followed by the charm studies are
presented.

T.Hirano (Columbia)
Perfect fluidity of QGP at RHIC?

Last year, physicists at Brookhaven National Laboratory made an announcement that "RHIC serves the perfect liquid (of the QGP)". This exciting news was featured by a lot of media around the world. In this talk, I first introduce some backgrounds of the above announcement as I put a special emphasis on the importance of elliptic flow (azimuthal anisotropic pattern of the momentum distributions for observed particles). Then I show results from a hybrid model in which ideal hydrodynamic description of the QGP phase is followed by a kinetic description of the hadron phase. When the Glauber type initial condition is employed, the hybrid model reproduces p_T spectra, particle ratio, v_2(N_{part}), v_2(p_T), and v_2(eta). Hence, the picture obtained in this agreement is not only the perfect fluidity of
the QGP but also the highly dissipative hadronic gas. Whereas the agreement is found to be spoiled when the color glass condensate initial condition, whose cases are growing at RHIC energies, is considered. So, in order to answer a question whether a perfect fluid of QGP is discovered or not at RHIC, one requires a better
understanding of initial state created at RHIC.